双: two; twin; both; dual不: a block of wood动: harness cause disorder stir ...中心问题: central issue; crucial quest ...中心问题: central issue; centredness争论的起因, 争吵的中心问题: bone of discord; bone of dissention核心问题: the core issue良心问题: a case of conscience身心问题: body mind problem发展中的核心问题: core issues in development摆动中心: center of oscillation; oscillation center弹动中心: spring centre发动中心: trigger浮动中心: floating neutral滚动中心: roll center后转动中心: rear roll centre活动中心: action center; active center; activity center; center of action; center of activity (ca); ganglion; hub; seat; wellesley student center激动中心: activating centre; activation centre气动中心: aerodynamic center; aerodynamical center前滚动中心: front roll centre扰动中心: center distrubance; center of disturbance; centre of disturbance随动中心架: follower rest移动中心架: follow rest; travelling stay; travellingstay运动中心: centre of motion运动中心的: centrostaltic
